Compilare: main.cpp: In function 'int main()': main.cpp:80:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<v[nod].size();j++){ ~^~~~~~~~~~~~~~ main.cpp:87:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (p=0;p<ad[rv].size();p++){ ~^~~~~~~~~~~~~~ main.cpp:57:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&k); ^ main.cpp:59:40: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&val[i].first); ^ main.cpp:67:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&x,&y); ^